export function validateWorkflowSpec(input: any): boolean {
  if (!input || typeof input !== 'object') return false;
  if (!Array.isArray(input.nodes)) return false;
  for (const node of input.nodes) {
    if (typeof node !== 'object' || typeof node.type !== 'string' || typeof node.name !== 'string') {
      return false;
    }
  }
  // If connections are provided, they must be an array.
  if (input.connections && !Array.isArray(input.connections)) return false;
  return true;
}
